when two people are seeing eachother and agree to see other people as well, except one of the two people doesnt really want to be in an un exlusive relationship and winds up getting hurt. To put it simply two people that are dating eachother but one of them is getting more screwed than the other.

Im really into you but not into you enough to not go plant my seed elsewhere so I think we need to be in an open relationship.

1. Usually a long-distance relationship where the couple still want to be together, but one or both of them also wants to see other people. Occasionally used to test their partner. Sometimes causes heartbreak, especially when:

A: One person falls for the new person they hooked up with and falls out of love with their long distance partner.
or
B: When the person in the long distance relationship didn't tell the new person that he/she was already in a long distance relationship before dating said person, i.e cheating.

2. A polyamorous relationship.

1. Girl: "Okay, we gotta talk. I really do love you, and I wanna stay together, but I'm in college now and 100 miles away from you. I still love you, but I want to meet other people while I'm in there. So, let's make this an open relationship, okay?

Guy:...Sure.

A: Guy: Ugh, I can't believe I agreed to an open relationship, now she left me for some player!

B: Girl#1: "Man, I can't believe that he actually dumped me for this chick in college!"

Girl#2: "Ouch. Didn't you know? He is in an open relationship with her."

2. Girl#1: I heard that Jack is in an open relationship, isn't that crazy?! He walks around holding two girls hands like he owns them!
Girl#2: Well, hey. At least he's not cheating on them.

1 For a female, the state or condition of being single. For a male, the state or condition of being a servile fuck-wit.

2. A heterosexual relationship or marriage in which the female engages in sexual relations with multiple partners and somehow talks the male into accepting this. The male partner in such a relationship is known as the patsy or victim. This person may speak openly about being "in an open relationship," but generally does not himself pursue alternate partners. The male in these cases is almost always a dutiful idiot, often a SNAG, who sits at home and develops a potentially deadly ulcer, while his partner gets nasty with every dude she can. This type of male is also known as a man-bitch.

The Open Relationship is exclusively dominated by the female. Normal men who wish to pursue multiple sex partners remain single or cheat. This does not include so-called swingers, a sub-class of perv.

The Open Relationship is, more often than not, a precursor to divorce, or occasionally to homicide.

Debbie and Emil are in an open relationship.

Dude! Oh my God. She invited me over for dinner with the two of them.

Don't do it, man. Fake your own death. Anything. There is no good outcome.

is ideal to have when two people are too far away from each other to have a real relationship, but still like each other. It's a way to see other people if the "need" arises, but still keep feelings for the one far away. However, it is especially important that you DO tell when you see someone else.

Near: Hi Far, what did you do last night?
Far: I totally hooked up someone last night.
Near: WTF! You slut, whore, bitch! I can't believe you!
Far: But we have an open relationship.
Near: Oh, I forgot.
Far: And it didn't mean anything. He wasn't that good anyway.
Near: Oh, okay...
Far: I still like you.
Near: I like you too, I suppose.
Far: Awesome, I'm happy we're still together.
Near: Yea.